A new report by NatureFinance and the Private Infrastructure Development Group shows why investing in water-related infrastructure requires more than assessing the asset itself. It also means understanding, pricing and managing the natural systems on which its performance depends.
The world has entered what the United Nations describes as an era of global water bankruptcy, in which many river basins and aquifers can no longer return to historical baselines.
The hydrology infrastructure was built around is shifting fast. Supplies once reliable are drying up, floods and droughts are hitting harder, and the natural systems that store and clean water are under real strain. For developers and investors, this is now a financial issue, not just an environmental one.
The report examines how water risk can shape infrastructure performance, resilience and investment outcomes, drawing on three real examples from Africa and Asia. Xuan Mai, Vietnam had to abandon a groundwater supply after years of over-pumping left it contaminated with arsenic. Cape Town, South Africa came close to running out of water entirely after a drought exposed how much its reservoirs relied on an unmaintained upstream catchment. Wuhan, China lost so many of its lakes and wetlands to development that it had nowhere left for floodwater to go.
Across all three cases, infrastructure underperformance reflected not only engineering shortcomings, but changes in the natural water systems on which the assets depended. This pattern shows why those dependencies need to be built into how water-related infrastructure is appraised, structured and financed.
Key findings
1. Grey and green infrastructure are rarely evaluated as one system. A wetland or watershed that protects a project is often costed separately, making it appear to be an add-on rather than, in many cases, the lower-cost way to deliver the same protection.
2. When natural systems are treated as fixed externalities, the project carries the risk by default, and the risk stays unpriced. Deals rarely specify who absorbs the cost if surrounding land or water conditions change. When that risk is left unassigned, it remains with the project and is rarely priced in.
3. The upkeep of natural systems is rarely funded. Cape Town is a notable exception, with dedicated financing for catchment restoration. Most projects assume ecosystems will continue to provide essential services without anyone paying to maintain them.
4. There is still no accessible insurance market for large-scale water ecosystem risks. Drought and contamination risks are not routinely transferable, so losses remain on project balance sheets and often ultimately fall to the public sector.
Why this matters
Underlying all four findings is the same structural problem: protecting a water system usually prevents future losses rather than generating direct revenue. The value created may be substantial, but it does not automatically produce the cash needed to repay a loan or deliver a return to investors.
The task is therefore to bring the full value of ecosystem protection into investment appraisal and develop financing models that convert avoided losses into contractable revenue. As water demand rises and ecosystems come under growing pressure, protecting the natural systems that infrastructure depends on is no longer only an environmental consideration. It is fundamental to building resilient investments and economies.
Looking ahead
The report introduces a practical seven-step decision framework to help developers and investors move beyond identifying water risk and integrate it into project appraisal, pricing, financing structures, deal terms and lifecycle governance.
The next step is to make this standard practice across infrastructure investment.
